Suction nozzle



May 14, 1940.

e. E. BJORKMAN 2,200,769

SUCTION NOZZLE Filed March a, 1936 INVENTOR, m M BY 4,; ATTORNEY.

" Patented May 14, 1940 UNITED STATES SUCTION NOZZLE Gustaf ErikBjiirkman, Saltsjo-Nacka, Sweden, assignor to Electrolux Corporation,Dover, Del., a corporation of Delaware Application March 3',

In Germany 3 Claims.

My invention relates to suction nozzles for use in connection withvacuum cleaners, and more particularly to a suction nozzle which isadapted for removing dirt from corners and other more 5 or lessinaccessible locations.

The manner in which I attain this object, as well as further objects andadvantages of my invention, will be apparent from the followingdescription considered in connection with the accompanying drawing whichforms a part of the specification and of which:

Fig. 1 is a front view, partially in cross-section, of a nozzleembodying my invention;

Fig. 2 is a cross-sectional view taken on the line 2-2 of Fig. 1; and

Fig. 3 is a bottom view of the nozzle shown in Figs. 1 and 2.

Referring more particularly to Figs. 1 through 3, reference character ldesignates a suction nozzle including parallel elongated front and rearwalls II and I 2, respectively. These walls are joined at their ends bymeans of end walls l3. Walls ll, l2, and I3 define an elongated hollowbody to which is connected a tubular 2.3 member 14 adapted to receivea'conduit leading to a source of suction, such as a vacuum cleaner unit.Member I 4, as shown, extends obliquely from the rear of the nozzle 10.

The lower edges of walls H and I2 constitute nozzle lips bounding alower elongated opening into the hollow body. This opening is partiallyclosed by means of a plate l5 which extends the entire length of theopening between end walls l3 and extends from the rear wall l2 toclosely .3 adjacent the front wall I I, leaving a narrow elongatedsuction opening l6 immediately adjacent to the forward wall ll. Plate l5may be secured in place by any suitable means, such as screws I! whichhave threaded engagement with the nozzle body. It will be noted that thelip formed by forward wall II is slightly lower than the lip formed byrear wall l2. Plate I5 is preferably formed with an offset as is shownat ill, in order that its opposite sides may be at substantially thesame level as the respective lips, Also, the

forward edge of plate l5 bounding the opening it is preferably formed asa portion of an are,

as is shown in Fig. 3 in order that the opening l6 may be wider-at itscentral part than at its 50 ends. This is desirable in'order to equalizethe suction along the length of the suction opening l6, inasmuch as itwould normally be greater at the center .due to its proximity to thetubular member M which is connected to the source of suction.

1936, Serial No. 66,834 March 5, 1935 End walls I 3 have portions l9depending below the lips of both walls II and I2. The lower faces 20 ofportions I9, which are adapted to contact the surface undergoingcleaning, are rounded as is clearly shown in Fig. 2. As shown, the endsof portions I9 adjacent to forward wall II have a larger radius ofcurvature than the other ends of portions IS. The suction opening I6 islocated off-center with respect to the centers of curvature of faces 20,whereby rocking the nozzle on these faces 20 causes suction opening l6to be brought closer to or removed farther from the surface undergoingcleaning.

The operation of the above described device will be largely apparentfrom the above description. When tubular member I4 is connected to asource of suction, air is drawn in through suction opening l6 and, ifthe tool is passed over a dusty surface, dust is entrained with thisair. Due to the fact that the suction opening I6 is located immediatelyadjacent to the forward wall II and entirely to one side of the centerline of the nozzle, the suction will be strongly concentrated adjacentto forward wall I I. Consequently, if the nozzle is placed against, forinstance, a baseboard, the suction will be strongly concentrated at thecorner formed by the floor and the baseboard. With an ordinary type ofnozzle, no such concentration of suction takes place with the resultthat much of the dirt deposited in the corner is not removed.

By rocking the nozzle on the curved faces 20. the proximity of thesuction opening I6 to the surface undergoing cleaning may be varied andhence, the degree of suction applied to the surface may be varied. Forinstance, if it is desired to remove small heavy objects, such as grainsof sand, this may best be done by rocking the nozzle so that the openingI 6 is very close to the surface. On the other hand, larger but lighterobjects may be picked up by the nozzle with the opening l6 spaced agreater distance from the surface.

While I have shown and described a more or less specific embodiment ofmy invention, it is to be understood that this has'been done forpurposes of illustration only and the scope thereof is to be limitedonly by the appended claims viewed in the light of the prior art.

What I claim is:

1. In a suction nozzle for cleaning'a surface, means including a pair oflongitudinally extending side walls and a pair of transversely extendingend walls defining an elongated hollow nozzle body, and means forconnecting said hollow body to a' source of suction, said hollow bodybeing formed with an elongated suetion opening disposed between said endwalls, said end walls having rounded bottom surface contacting portionsdepending below said side walls, saidsuction opening being off-centerwith respect to said rounded portions whereby the distance between saidsuction opening and the surface is variable by rocking said nozzle onsaid rounded portions.

2. In a suction nozzle for cleaning a surface, means including a pair oflongitudinally extending side walls and a pair of transversely extendingend walls defining an elongated hollow noz-' said suction opening andthe surface is variable y by rocking said nozzle on said rounded faces.

3. In a suction nozzle, a hollow body including longitudinally extendingstraight forward and rear walls and transversely extending end walls,the lower edge of the forward wall being narrow and constituting astraight forward lip of the nozzle, and an imperforate plate memberextending from the rear wall to adjacent to the forward wall to defineat the front portion of said nozzle a narrow elongated suction openingbounded on one side by said'narrow lip and on the other by the edge ofsaid plate member, said end wallsbeing convex downwardly and havingtheir lowest portions spaced rearwardly of said opening, said end wallsprojecting below said plate member and-said forward and rear walls toprovide supporting rocker surfaces extending at right angles to thenarrow suction opening to normally maintain both said forward lip andsaid plate member spaced above the surface being cleaned.

GUS'I'AE ERIK BJGRKMAN.

